A three-dimensional measuring method for magnetic stray fields

Author

Matsuda, J. ; Aoyagi, K. ; Kondoh, Y. ; Iizuka, M. ; Mukasa, K.

Author_Institution

Fac. of Eng., Nagaoka Univ. of Technol., Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2061

Lastpage

2063

Abstract

Reconstruction of three-dimensional microstray magnetic fields from a set of deflection data of electron probes deflected by the Lorentz force when passing through the object magnetic field is described. A novel reconstruction technique based on the ART (algebraic reconstruction technique) iterative method for electron beam tomography is proposed. In computer simulation, the algorithm was tested with a model example of a one-turn coil, and the achievable resolution is discussed. The algorithm was also checked experimentally with a one-turn oil and a commercial magnetic head. From these results, it is shown that the proposed method is applicable to high-intensity magnetic field reconstruction problems in electron beam tomography

Keywords

computerised tomography; digital simulation; electrical engineering computing; iterative methods; magnetic field measurement; magnetic heads; ART iterative method; Lorentz force; algebraic reconstruction technique; commercial magnetic head; computer simulation; deflection data; electron beam tomography; electron probes; magnetic head design; one-turn coil; three-dimensional measuring method; three-dimensional microstray magnetic fields; Computer simulation; Electron beams; Iterative algorithms; Iterative methods; Lorentz covariance; Magnetic field measurement; Probes; Subspace constraints; Testing; Tomography;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104620

Filename

104620